Manual/pneumatic oil pumping device

ABSTRACT

A manual/pneumatic oil pumping device having a housing defining therein an oil reserving space and an upper cover. A floating board is disposed in the oil reserving space. The upper cover is equipped with a manual air sucking mechanism, a pneumatic air sucking mechanism and an oil sucking tube. The pneumatic air sucking mechanism is provided with a controlling unit. The control controlling unit includes a seat body, a valve body, a sleeve and a movable block. The movable block is fitted in the sleeve and has a downward extending projecting post. When the oil is pumped to fill up in the oil reserving space, the projecting post is upward pushed by the floating board to make movable block move upward. At this time, the leakproof washer on the movable block seals the through hole of the seat body and the push pin pushes the valve body away from the through hole so as to block the air sucking passage of the pneumatic air sucking mechanism.

BACKGROUND OF THE INVENTION

[0001] The present invention is related to a manual/pneumatic oil pumping device. A control controlling unit is disposed in an air sucking passage of the pneumatic air sucking mechanism. When the oil is pumped to fill up in the housing of the device, the air sucking passage of the pneumatic air sucking mechanism is automatically blocked.

[0002]FIGS. 7 and 8 show a conventional manual/pneumatic oil pumping device having a housing 81. An oil reserving space 82 is defined in the housing 81. A floating board 83 is disposed in the oil reserving space 82. An upper cover 84 is disposed on the housing 81. The upper cover 84 is equipped with a manual air sucking mechanism 7, a pneumatic air sucking mechanism 6 and an oil sucking tube 85.

[0003] The pneumatic air sucking mechanism 6 has an air incoming passage 61 communicating with an air pressure source. A rear end of the air incoming passage 61 has an outlet 62. In addition, the air incoming passage 61 has an air sucking passage 63 communicating with the oil reserving space 82. Several stop plates 64 are disposed in the air sucking passage 63 at intervals. A seat body 65 is disposed at bottom end of the air sucking passage 63. A steel ball 66 is disposed in the seat body 65. The bottom of the seat body 65 is formed with a through hole 651. A leakproof ring 67 is positioned between the bottom of the seat body 65 and the steel ball 66. In normal state, the steel ball 66 will drop due to its own weight to block the through hole 651 and disconnect the pneumatic air sucking mechanism 6 and the oil reserving space 82 from each other. Under such circumstance, the manual air sucking mechanism 7 is operable to suck air and pump the oil.

[0004] The manual air sucking mechanism 7 has an upright pump 71 in which a piston 72 is installed. The piston rod 73 of the piston 72 passes through the upper cover 84 and is provided with a handle 74 for a user to operate. The upper cover 84 is formed with an air incoming passage (not shown) communicating with the oil reserving space 82 and the interior of the pump 71. The blocking/unblocking of the air incoming passage is controlled by a float 75. After the oil in the oil reserving space 82 ascends, the float 75 is pushed to block the air incoming passage and prevent the oil from being sucked into the pump 71.

[0005] The manual air sucking mechanism 7 includes a float 75 for blocking the air incoming passage. However, the pneumatic air sucking mechanism 6 lacks such design. In other words, when using the pneumatic air sucking mechanism 6 to suck air and pump the oil, in the case that the oil in the oil reserving space 82 ascends to the height of the seat body 65, the oil will be sucked from the through hole 651 of the seat body 65 into the air sucking passage 63 and ejected from the outlet 62.

SUMMARY OF THE INVENTION

[0006] It is therefore a primary object of the present invention to provide a manual/pneumatic oil pumping device. A movable block is fitted in a sleeve of a controlling unit. The movable block has a downward projecting post. When the oil reserving space is filled up with oil, a floating board will ascend to push the projecting post so as to move the movable block upward. At this time, a leakproof washer of the movable block will seal a through hole of the seat body. Therefore, the oil in the oil reserving space is prevented from leaking.

[0007] It is a further object of the present invention to provide the above manual/pneumatic oil pumping device in which when the leakproof washer seals the through hole of the seat body, a push pin of the movable block pushes away a valve body from the through hole of the seat body. Therefore, the space between the leakproof washer and a silicone ring keeps communicating with the air sucking passage so as to avoid clog of the controlling unit.

[0008] It is still a further object of the present invention to provide the above manual/pneumatic oil pumping device in which a weight block is fitted in the projecting post of the movable block. Therefore, when the pneumatic air sucking mechanism sucks air, the movable block will not be sucked upward so that the through hole of the seat body will not be blocked.

[0009] The present invention can be best understood through the following description and accompanying drawings wherein:

BRIEF DESCRIPTION OF THE DRAWINGS

[0010]FIG. 1 is a perspective assembled view of the manual/pneumatic oil pumping device of the present invention;

[0011]FIG. 2 is a sectional view showing the manual air sucking mechanism of the present invention;

[0012]FIG. 3 is a sectional view showing the pneumatic air sucking mechanism of the present invention;

[0013]FIG. 4 is a sectional view showing the pneumatic air sucking mechanism and the controlling unit of the present invention;

[0014]FIG. 5 is a sectional view showing the use of the pneumatic air sucking mechanism of the present invention;

[0015]FIG. 6 is a sectional view showing the controlling unit of the present invention in a closed state;

[0016]FIG. 7 is a sectional view of a conventional manual/pneumatic oil pumping device; and

[0017]FIG. 8 is an enlarged view of a part of FIG. 7.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0018] Please refer to FIGS. 1 to 4. The manual/pneumatic oil pumping device of the present invention has a housing 1. An oil reserving space 11 is defined in the housing 1. A floating board 12 is disposed in the oil reserving space 11. An upper cover 13 is disposed on the housing 1. The upper cover 13 is equipped with a manual air sucking mechanism 2, a pneumatic air sucking mechanism 3 and an oil sucking tube 14.

[0019] The manual air sucking mechanism 2 has an upright pump 21 in which a piston 22 is installed. The piston 22 is connected with a piston rod 23 passing through the upper cover 13 and provided with a handle 24 for a user to operate. The upper cover 13 is formed with an air incoming passage 131 communicating with the oil reserving space 11 and the interior of the pump 21. The blocking/unblocking of the air incoming passage 131 is controlled by a float 25. After the oil in the oil reserving space 11 ascends, the float 25 is pushed to block the air incoming passage 131 and prevent the oil from being sucked into the pump 21.

[0020] The pneumatic air sucking mechanism 3 has a connector 31 connected with an air pressure source. The connector 31 communicates with a main flow way 32. The other end of the main flow way 32 is connected with an air exhaust outlet 33. A middle section of the main flow way 32 communicates with an air sucking passage 34 having an opening 341 extending to the oil reserving space 11. Several stop plates 342 are disposed in the air sucking passage 34 at intervals. In addition, a controlling unit 4 is connected at the opening 341 of the air sucking passage 34.

[0021] The controlling unit 4 includes a seat body 41 disposed at the opening 341 of the air sucking passage 34. A movement space 42 is defined between the seat body 41 and the air sucking passage 34. One side of the seat body 41 distal from the air sucking passage 34 is formed with a through hole 411 communicating with the movement space 42. The circumference of the through hole 411 is formed with a stop face 412. A valve body is disposed in the movement space 42. In this embodiment, the valve body is a steel ball 43. A hollow silicone ring 44 is positioned between the stop face 412 and the steel ball 43. The silicone ring 44 permits the through hole 411 to communicate with the movement space 42. The silicone ring 44 is formed with a conic dent 441 corresponding to the steel ball 43. The outer diameter of the steel ball 43 is larger than the minimum diameter of the dent 441. In normal state, the steel ball 43 due to its own weight drops onto the dent 441 to block the through hole 411 so as to disconnect the pneumatic air sucking mechanism 3 from the oil reserving space 11. Under such circumstance, the manual air sucking mechanism 2 is operable to pump oil.

[0022] One side of the seat body 41 opposite to the air sucking passage 34 is connected with a sleeve 45 having multiple inlets 451 radially passing through the sleeve 45. One end of the sleeve 45 distal from the seat body 41 is formed with a hole 452.

[0023] A movable block 46 is fitted in the sleeve 45. The movable block 46 has a projecting post 461 extending out of the sleeve 45 through the hole 452 thereof. A weight block 462 is fitted in the projecting post 461. An end face 463 of the movable block 46 proximal to the seat body 41 has a push pin 464 corresponding to the through hole 411 of the seat body 41. The outer diameter of the push pin 464 is smaller than the inner diameter of the through hole 411, whereby air can flow through the gap between the push pin 464 and the wall of the through hole 411. The push pin 464 has a small diameter section 465 adjacent to the end face 463. A leakproof washer 466 is fitted around the small diameter section 465. When the projecting post 461 of the movable block is upward pushed by the floating board 12 to make the leakproof washer 466 abut against the seat body 41 to block the through hole 411, the push pin 464 pushes away the steel ball 43 so as to unblock the through hole 411.

[0024] Referring to FIG. 5, when a switch 311 of the connector 31 of the pneumatic air sucking mechanism 3 is switched on, the high pressure air coming from the air pressure source will flow into the main flow way 32. When the air in the main flow way 32 flows through the air sucking passage 34, according to Venturi tube principle, a sucking force is applied to the air sucking passage 34 to suck the steel ball 43 upward. The steel ball 43 is stopped by the stop plates 342, whereby the through hole 411 communicates with the air sucking passage 34. At this time, the air in the oil reserving space 11 is sucked into the inlets 451 to go through the through hole 411 into the air sucking passage 34. Then the air is exhausted from the air exhaust outlet 33.

[0025] The movable block 46 is heavier and provided with a weight block 462 so that it will not be sucked upward. Therefore, the inlets 451 keep communicating with the through hole 411.

[0026] After the air in the oil reserving space 11 is sucked away, the oil reserving space 11 becomes in a negative air pressure state. At this time, the oil is sucked through the oil sucking tube 14 into the oil reserving space 11. Following the increment of the sucked in oil, the floating board 12 is gradually buoyed up by the ascending oil. When the oil in the oil reserving space 11 ascends to a certain height, the floating board 12 will push the projecting post 461 of the movable block 46 upward until the leakproof washer 466 abuts against the seat body 41 to block the through hole 411 as shown in FIG. 6. Accordingly, the oil is effectively prevented from being sucked out from the air sucking passage 34.

[0027] It should be noted that when the movable block 46 is moved upward to make the leakproof washer 466 abut against the seat body 41 to block the through hole 411, the push pin 464 of the movable block 46 will extend through the through hole 411. When the switch 311 of the connector 31 is switched off and the steel ball 43 drops down, the push pin 464 will abut against the steel ball 43 and keep it separated from the dent 441 without blocking the through hole 411. Therefore, the space between the leakproof washer 466 and the silicone ring 44 keeps communicating with the air sucking passage 34.

[0028] Otherwise, in the case that the steel ball 43 drops onto the dent 441 to block the through hole 411, the space between the leakproof washer 466 and the silicone ring 44 will be vacuumized.

[0029] Under such circumstance, after the oil is drained from the oil reserving space 11, the movable block 46 will be unable to drop down to clog the controlling unit 4. Once the controlling unit 4 is clogged, the pneumatic air sucking mechanism 3 will be unable to further operate for sucking air and pumping oil.

[0030] According to the above arrangement, the present invention has the following advantages:

[0031] 1. The movable block 46 fitted in the sleeve 45 having a downward projecting post 461. When the oil reserving space 11 is filled up with oil, the floating board 12 will ascend to push the projecting post 461 so as to move the movable block 46 upward. At this time, the leakproof washer 466 of the movable block 46 will seal the through hole 411 of the seat body 41. Therefore, the oil in the oil reserving space is prevented from leaking.

[0032] 2. When the floating board 12 pushes the projecting post 461 to move the movable block 46 upward and the leakproof washer 466 seals the through hole 411, the push pin 464 will push away the steel ball 43. Therefore, the space between the leakproof washer 466 and the silicone ring 44 keeps communicating with the air sucking passage 34 so as to avoid clog of the controlling unit 4.

[0033] 3. The weight block 462 is fitted in the projecting post 461 of the movable block 46. Therefore, when the pneumatic air sucking mechanism 3 sucks air, the movable block 46 will not be sucked upward so that the through hole 411 of the seat body 41 will not be blocked.

[0034] The above embodiment is only used to illustrate the present invention, not intended to limit the scope thereof. Many modifications of the above embodiment can be made without departing from the spirit of the present invention. 

What is claimed is:
 1. A manual/pneumatic oil pumping device comprising a housing defining an oil reserving space therein, a floating board being disposed in the oil reserving space, an upper cover being disposed on the housing and equipped with a manual air sucking mechanism, a pneumatic air sucking mechanism and an oil sucking tube, said pneumatic air sucking mechanism including an air sucking passage having an opening extending to the oil reserving space, several stop plates being disposed in the air sucking passage at intervals, the pneumatic air sucking mechanism being provided with a controlling unit, when the controlling unit is opened, the oil reserving space communicating with the pneumatic air sucking mechanism, whereby the pneumatic air sucking mechanism is able to suck air out of the oil reserving space for pumping oil, when the controlling unit is closed, the oil reserving space being disconnected from the pneumatic air sucking mechanism, whereby the manual air sucking mechanism is operable for pumping oil, said manual/pneumatic oil pumping device being characterized in that said controlling unit includes: a seat body disposed at the opening of the air sucking passage, a movement space being defined between the seat body and the air sucking passage, one side of the seat body distal from the air sucking passage being formed with a through hole communicating with the movement space; a valve body disposed in the movement space, in normal state, the valve body due to its own weight blocking the through hole; a sleeve connected with one side of the seat body opposite to the air sucking passage, the sleeve having more than one inlet, one end of the sleeve distal from the seat body being formed with a hole; and a movable block fitted in the sleeve, the movable block having a projecting post extending out of the sleeve through the hole thereof, a leakproof washer being disposed on an end face of the movable block adjacent to the seat body, the end face having a push pin corresponding to the through hole of the seat body, an outer diameter of the push pin being smaller than an inner diameter of the through hole, whereby air can flow through the gap between the push pin and the wall of the through hole, when the projecting post of the movable block is upward pushed by the floating board to make the leakproof washer seal the through hole, the push pin pushing away the valve body.
 2. The manual/pneumatic oil pumping device as claimed in claim 1, wherein the valve body is a ball body.
 3. The manual/pneumatic oil pumping device as claimed in claim 2, wherein a silicone ring is positioned between the through hole of the seat body and the ball body, the silicone ring being formed with a conic dent corresponding to the ball body for the ball body to abut against the dent.
 4. The manual/pneumatic oil pumping device as claimed in claim 1, wherein an axially extending weight block is fitted in the projecting post of the movable block.
 5. The manual/pneumatic oil pumping device as claimed in claim 1, wherein the push pin has a small diameter section adjacent to the end face of the movable block, the leakproof washer being fitted around the small diameter section. 